If you haven't paid or filed yet, you can view, edit, print, or e-file your 2017 TurboTax Online return through October 15, 2018 (after which we close e-filing for the 2017 tax season).
Paying for PLUS (if using Free Edition/Absolute Zero), Deluxe, Premier, Self-Employed, TurboTax Live or Expert Services gives you access to all your TurboTax Online returns through October of the following year. Doing this every year lets you enjoy uninterrupted access to all your TurboTax Online returns both past and present.
https://ttlc.intuit.com/questions/2897254-how-long-will-i-be-able-to-access-my-2017-turbotax-online-...
